These images show the terrifying weapons cache found at a bomb making factory run by ISIS terrorists who were "planning attacks across Russia".

Security services have detained seven members of the terrorist group accused of planning terror attacks on Moscow and St Petersburg.

The militants had a bomb making factory with detonators, explosives, grenades and firearms and were plotting a high-profile attack.

The arrests were made after Police swooped on the group in the Urals city of Yekaterinburg, 100 miles from the border with Kazakstan.

FSB agents had received intelligence the terrorists they were planning to strike the Russian capital Moscow.

The group included Russian nationals and citizens of Central Asian states, who were also planning attacks in the Sverdlovsk region in the Urals, the FSB said.

They were led by an ISIS fighter who had arrived from Turkey, the FSB said, giving no further detail.

Russian security experts have warned that the country is facing a "substantial" threat from homegrown extremists, with the potential for tens of thousands of radicalised to be living within its borders, Express reported.